Switch subtitle tracks

1
playerViewController.subtitleTrackDelegate = self

1
// Pass the display name of the language (case-insensitive)
2
playerViewController.setPreferredSubtitleTrack("Hindi")

1
let subtitleTracks = playerViewController.getSubtitleTracks()

1
// Returns nil if subtitles are disabled
2
let currentTrack = playerViewController.getCurrentSubtitleTrack()

1
// Switch by track ID
2
try? playerViewController.setSubtitleTrack(trackId: track.id)

1
playerViewController.disableSubtitles()

1
private let subtitleLabel: UILabel = {
2
    let label = UILabel()
3
    label.textColor = .white
4
    label.font = UIFont.systemFont(ofSize: 16, weight: .medium)
5
    label.textAlignment = .center
6
    label.numberOfLines = 0
7
    label.backgroundColor = UIColor.black.withAlphaComponent(0.5)
8
    label.translatesAutoresizingMaskIntoConstraints = false
9
    return label
10
}()

1
private func setupSubtitleLabel() {
2
    playerViewController.view.addSubview(subtitleLabel)
3
    playerViewController.view.bringSubviewToFront(subtitleLabel)
4
5
    NSLayoutConstraint.activate([
6
        subtitleLabel.leadingAnchor.constraint(
7
            equalTo: playerViewController.view.leadingAnchor, constant: 20),
8
        subtitleLabel.trailingAnchor.constraint(
9
            equalTo: playerViewController.view.trailingAnchor, constant: -20),
10
        subtitleLabel.bottomAnchor.constraint(
11
            equalTo: playerViewController.view.bottomAnchor, constant: -130)
12
    ])
13
}

1
extension VideoPlayerViewController: FastPixSubtitleTrackDelegate {
2
3
    // Called when subtitle tracks finish loading
4
    func onSubtitlesLoaded(tracks: [SubtitleTrack]) {
5
        print("Subtitle tracks available:", tracks)
6
    }
7
8
    // Called when the active subtitle track changes
9
    func onSubtitleChange(track: SubtitleTrack?) {
10
        print("Subtitle switched to:", track?.label ?? "Off")
11
    }
12
13
    // Called every time a new subtitle cue becomes active
14
    func onSubtitleCueChange(information: SubtitleRenderInfo) {
15
        DispatchQueue.main.async {
16
            if information.text.isEmpty {
17
                self.subtitleLabel.isHidden = true
18
            } else {
19
                self.subtitleLabel.text = information.text
20
                self.subtitleLabel.isHidden = false
21
            }
22
        }
23
    }
24
25
    // Called when subtitle tracks fail to load
26
    func onSubtitlesLoadedFailed(error: SubtitleTrackError) {
27
        print("Subtitle load failed:", error)
28
    }
29
}